Plate-printing press



2 Sheets-Sheet 1.

(No Model.)

P. H. ALLEN. PLATE PRINTING PRESS.

Patented Jan. 27, 1891.

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FRED II. ALLEN, OF AUBURN, MAINE.

PLATE-PRINTING PRESS.

SPECIFICATION forming part of Letters Patent No. 445,150, dated January 27, 1891.

Application filed March 8, 1889.

To all whom t may concern:

Be it known that I, FRED I-I. ALLEN, a citizen of the United States, residing at Auburn, in the county of Androscoggin and State of Maine, have invented certain new and useful Improvements in Plate-Printin g Presses; and I do hereby declare the following to be a full,v clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to plate -printing presses such as are used for printing copper and steel plates.

The object of my invention is to construct a plate-printing press which shall have the feeding mechanism outside the standards, thereby giving more room for the plate between the standards and thus increasing the capacity of the press and avoiding use of oil near the plates.

My invention consists in the combination of an Outrigger attached to the side of the bed, a stud or roll secured to said Outrigger', an arm secured to the impression-roll journal, and a cam adjustably secured to said arm and adapted to impinge on said stud and to release it at any desired point.

My invention consists of the combinations of devices set forth in the claim.

I illustrate my invention by means of the accompanying drawings, although I do not wish to be confined to the exact structure here shown.

In the drawings, Figure l is a plan view of a press embodying myinvention. Fig. 2 is a section online @c of Fig. l. Fig. f5 is a side elevationJ and Fig. l is a detail, of the arm and stud at the point when the latter is let ofi.

A is the framework oll the machine.

ll is the movable bed.

A A are the standards, to which are journaled the shaft or journal g of the impressionroll G.

D is the hand-wheel for rotating' the ilnpression-roll.

The abovenan1ed parts are all of ordinary and well-known construction and do not require more particular description.

To the side of t-he bed B, I attach an outrigger C, which extends outside of the stand- Serial No. 302,496. (No model.)

ard A. I prefer to drop this Outrigger somewhat below the level of the bed, for the reason hereinafter mentioned.

To the Outrigger C, I attach a stud or roll f, and this I preferto make adj ustable lengthwise of the Outrigger by n ieans of a slot c, through which the bolt f extends, and which is secured by a nut f2 on the inside.

An arm E is adj ustablyseeured to the journal g. This I accomplish, as herein shown, by forming` the arm with adisk E', which fits around the shaftand within a recess formed on the inside of the hub of the hand-wheelD. This disk is free to turn on the journal and is clamped in any desired position by means of a set-screw (Z, passing through the hub of the wheel D and impinging on the disk E.

To the end of the arm E7 I secure a cam e, formed to strike the stud f in a direction as nearly in line of motion of the bed as may be. The cam is placed on the inside of the arm, so that as it drops on being rotated it passes completely under the stud f, letting it off or releasing it from contact with the cam e. The arm E is placed far enough away so that it clears the stud. As here shown, I secure the cam c to the arm E by means of a bolt e2, passing through a slot c, so that it may he adjustable to any desired position. It is obvious thatI can use an outerfriction-roll ora rigid stud for the cam c to operate upon.

The operation of my device is evident from its structure, as explained. As the wheel I) is rotated the cam e impinges on the stud or roll f, forcing the bed forward until the impressioirroll is in position to take the paper, when the cam drops below the stud and thus releases it aud allows the impressiona'oll to continue the movement of the hed. As will be seen, the length ol the arm E, which is occasioned by the dropping of the Outrigger below the bed, gives to the latter a rapid motion from the start to the point of contact with the impressien-roll,thereby saving much time and adding to the capacity of the press. It is obvious that the arm E must be adjusted circumferentially on the journal g, the cam adjusted on the arni E, and the stud on the Outrigger, in order to cause the cam to let off at just the right point, which, as before pointed out, must be at the moment of contact of IOO the roll and the plate. Since the cam strikes the stud in the line of motion of the bed, or nearly so, as pointed out, there is no tendency to tilt or otherwise disturb the bed, and asa result my press works much more smoothly than those hitherto in use.

Another advantage of my press is that the space between the standards is leftl free from obstruction, so that the paper may fill the whole space. A press embodying my invention is thus able to do larger work than an old press of the same size, and the danger of spoiling the prints by oil and grease is also obviated, -since the space occupied by the paperris now entirely free from lubricants.

l claimln a plate-printing press, the combination of a movable bed, an Outrigger attached to the side thereof, a stud or roll secured to said Outrigger, an arm secured to the impressionrolljonrnal, and a cam adjustably secured to said arm and adapted to impinge 011 said stud and to release it at any desired point, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

FRED H. ALLEN. Vitnesses:

B. F. Woon, A. R. SAVAGE. 

